1 /*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
48
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
56 #include <linux/slab.h>
57
58 /*
59 * Bucket size for counting good commands in between bad ones.
60 */
61 #define AHD_LINUX_ERR_THRESH 1000
62
63 /*
64 * Set this to the delay in seconds after SCSI bus reset.
65 * Note, we honor this only for the initial bus reset.
66 * The scsi error recovery code performs its own bus settle
67 * delay handling for error recovery actions.
68 */
69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
71 #else
72 #define AIC79XX_RESET_DELAY 5000
73 #endif
74
75 /*
76 * To change the default number of tagged transactions allowed per-device,
77 * add a line to the lilo.conf file like:
78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
79 * which will result in the first four devices on the first two
80 * controllers being set to a tagged queue depth of 32.
81 *
82 * The tag_commands is an array of 16 to allow for wide and twin adapters.
83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
84 * for channel 1.
85 */
86 typedef struct {
87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
88 } adapter_tag_info_t;
89
90 /*
91 * Modify this as you see fit for your system.
92 *
93 * 0 tagged queuing disabled
94 * 1 <= n <= 253 n == max tags ever dispatched.
95 *
96 * The driver will throttle the number of commands dispatched to a
97 * device if it returns queue full. For devices with a fixed maximum
98 * queue depth, the driver will eventually determine this depth and
99 * lock it in (a console message is printed to indicate that a lock
100 * has occurred). On some devices, queue full is returned for a temporary
101 * resource shortage. These devices will return queue full at varying
102 * depths. The driver will throttle back when the queue fulls occur and
103 * attempt to slowly increase the depth over time as the device recovers
104 * from the resource shortage.
105 *
106 * In this example, the first line will disable tagged queueing for all
107 * the devices on the first probed aic79xx adapter.
108 *
109 * The second line enables tagged queueing with 4 commands/LUN for IDs
110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
111 * driver to attempt to use up to 64 tags for ID 1.
112 *
113 * The third line is the same as the first line.
114 *
115 * The fourth line disables tagged queueing for devices 0 and 3. It
116 * enables tagged queueing for the other IDs, with 16 commands/LUN
117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
118 * IDs 2, 5-7, and 9-15.
119 */
120
121 /*
122 * NOTE: The below structure is for reference only, the actual structure
123 * to modify in order to change things is just below this comment block.
124 adapter_tag_info_t aic79xx_tag_info[] =
125 {
126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
130 };
131 */
132
133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
135 #else
136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
137 #endif
138
139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
148 }
149
150 /*
151 * By default, use the number of commands specified by
152 * the users kernel configuration.
153 */
154 static adapter_tag_info_t aic79xx_tag_info[] =
155 {
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS},
171 {AIC79XX_CONFIGED_TAG_COMMANDS}
172 };
173
174 /*
175 * The I/O cell on the chip is very configurable in respect to its analog
176 * characteristics. Set the defaults here; they can be overriden with
177 * the proper insmod parameters.
178 */
179 struct ahd_linux_iocell_opts
180 {
181 uint8_t precomp;
182 uint8_t slewrate;
183 uint8_t amplitude;
184 };
185 #define AIC79XX_DEFAULT_PRECOMP 0xFF
186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
188 #define AIC79XX_DEFAULT_IOOPTS \
189 { \
190 AIC79XX_DEFAULT_PRECOMP, \
191 AIC79XX_DEFAULT_SLEWRATE, \
192 AIC79XX_DEFAULT_AMPLITUDE \
193 }
194 #define AIC79XX_PRECOMP_INDEX 0
195 #define AIC79XX_SLEWRATE_INDEX 1
196 #define AIC79XX_AMPLITUDE_INDEX 2
197 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] __ro_after_init =
198 {
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS,
214 AIC79XX_DEFAULT_IOOPTS
215 };
216
217 /*
218 * There should be a specific return value for this in scsi.h, but
219 * it seems that most drivers ignore it.
220 */
221 #define DID_UNDERFLOW DID_ERROR
222
223 void
ahd_print_path(struct ahd_softc * ahd,struct scb * scb)224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
225 {
226 printk("(scsi%d:%c:%d:%d): ",
227 ahd->platform_data->host->host_no,
228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
230 scb != NULL ? SCB_GET_LUN(scb) : -1);
231 }
232
233 /*
234 * XXX - these options apply unilaterally to _all_ adapters
235 * cards in the system. This should be fixed. Exceptions to this
236 * rule are noted in the comments.
237 */
238
239 /*
240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
241 * has no effect on any later resets that might occur due to things like
242 * SCSI bus timeouts.
243 */
244 static uint32_t aic79xx_no_reset;
245
246 /*
247 * Should we force EXTENDED translation on a controller.
248 * 0 == Use whatever is in the SEEPROM or default to off
249 * 1 == Use whatever is in the SEEPROM or default to on
250 */
251 static uint32_t aic79xx_extended;
252
253 /*
254 * PCI bus parity checking of the Adaptec controllers. This is somewhat
255 * dubious at best. To my knowledge, this option has never actually
256 * solved a PCI parity problem, but on certain machines with broken PCI
257 * chipset configurations, it can generate tons of false error messages.
258 * It's included in the driver for completeness.
259 * 0 = Shut off PCI parity check
260 * non-0 = Enable PCI parity check
261 *
262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
263 * variable to -1 you would actually want to simply pass the variable
264 * name without a number. That will invert the 0 which will result in
265 * -1.
266 */
267 static uint32_t aic79xx_pci_parity = ~0;
268
269 /*
270 * There are lots of broken chipsets in the world. Some of them will
271 * violate the PCI spec when we issue byte sized memory writes to our
272 * controller. I/O mapped register access, if allowed by the given
273 * platform, will work in almost all cases.
274 */
275 uint32_t aic79xx_allow_memio = ~0;
276
277 /*
278 * So that we can set how long each device is given as a selection timeout.
279 * The table of values goes like this:
280 * 0 - 256ms
281 * 1 - 128ms
282 * 2 - 64ms
283 * 3 - 32ms
284 * We default to 256ms because some older devices need a longer time
285 * to respond to initial selection.
286 */
287 static uint32_t aic79xx_seltime;
288
289 /*
290 * Certain devices do not perform any aging on commands. Should the
291 * device be saturated by commands in one portion of the disk, it is
292 * possible for transactions on far away sectors to never be serviced.
293 * To handle these devices, we can periodically send an ordered tag to
294 * force all outstanding transactions to be serviced prior to a new
295 * transaction.
296 */
297 static uint32_t aic79xx_periodic_otag;
298
299 /* Some storage boxes are using an LSI chip which has a bug making it
300 * impossible to use aic79xx Rev B chip in 320 speeds. The following
301 * storage boxes have been reported to be buggy:
302 * EonStor 3U 16-Bay: U16U-G3A3
303 * EonStor 2U 12-Bay: U12U-G3A3
304 * SentinelRAID: 2500F R5 / R6
305 * SentinelRAID: 2500F R1
306 * SentinelRAID: 2500F/1500F
307 * SentinelRAID: 150F
308 *
309 * To get around this LSI bug, you can set your board to 160 mode
310 * or you can enable the SLOWCRC bit.
311 */
312 uint32_t aic79xx_slowcrc;
313
314 /*
315 * Module information and settable options.
316 */
317 static char *aic79xx = NULL;
318
319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
321 MODULE_LICENSE("Dual BSD/GPL");
322 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
323 module_param(aic79xx, charp, 0444);
324 MODULE_PARM_DESC(aic79xx,
325 "period-delimited options string:\n"
326 " verbose Enable verbose/diagnostic logging\n"
327 " allow_memio Allow device registers to be memory mapped\n"
328 " debug Bitmask of debug values to enable\n"
329 " no_reset Suppress initial bus resets\n"
330 " extended Enable extended geometry on all controllers\n"
331 " periodic_otag Send an ordered tagged transaction\n"
332 " periodically to prevent tag starvation.\n"
333 " This may be required by some older disk\n"
334 " or drives/RAID arrays.\n"
335 " tag_info:<tag_str> Set per-target tag depth\n"
336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
339 " amplitude:<int> Set the signal amplitude (0-7).\n"
340 " seltime:<int> Selection Timeout:\n"
341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
343 "\n"
344 " Sample modprobe configuration file:\n"
345 " # Enable verbose logging\n"
346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n"
347 " # Shorten the selection timeout to 128ms\n"
348 "\n"
349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
350 );
351
352 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
353 struct scsi_device *,
354 struct scb *);
355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
356 struct scsi_cmnd *cmd);
357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
360 struct ahd_devinfo *devinfo);
361 static void ahd_linux_device_queue_depth(struct scsi_device *);
362 static int ahd_linux_run_command(struct ahd_softc*,
363 struct ahd_linux_device *,
364 struct scsi_cmnd *);
365 static void ahd_linux_setup_tag_info_global(char *p);
366 static int aic79xx_setup(char *c);
367 static void ahd_freeze_simq(struct ahd_softc *ahd);
368 static void ahd_release_simq(struct ahd_softc *ahd);
369
370 static int ahd_linux_unit;
371
372
373 /************************** OS Utility Wrappers *******************************/
374 void ahd_delay(long);
375 void
ahd_delay(long usec)376 ahd_delay(long usec)
377 {
378 /*
379 * udelay on Linux can have problems for
380 * multi-millisecond waits. Wait at most
381 * 1024us per call.
382 */
383 while (usec > 0) {
384 udelay(usec % 1024);
385 usec -= 1024;
386 }
387 }
388
389
390 /***************************** Low Level I/O **********************************/
391 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
393 void ahd_outw_atomic(struct ahd_softc * ahd,
394 long port, uint16_t val);
395 void ahd_outsb(struct ahd_softc * ahd, long port,
396 uint8_t *, int count);
397 void ahd_insb(struct ahd_softc * ahd, long port,
398 uint8_t *, int count);
399
400 uint8_t
ahd_inb(struct ahd_softc * ahd,long port)401 ahd_inb(struct ahd_softc * ahd, long port)
402 {
403 uint8_t x;
404
405 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
406 x = readb(ahd->bshs[0].maddr + port);
407 } else {
408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
409 }
410 mb();
411 return (x);
412 }
413
414 #if 0 /* unused */
415 static uint16_t
416 ahd_inw_atomic(struct ahd_softc * ahd, long port)
417 {
418 uint8_t x;
419
420 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
421 x = readw(ahd->bshs[0].maddr + port);
422 } else {
423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
424 }
425 mb();
426 return (x);
427 }
428 #endif
429
430 void
ahd_outb(struct ahd_softc * ahd,long port,uint8_t val)431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
432 {
433 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
434 writeb(val, ahd->bshs[0].maddr + port);
435 } else {
436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
437 }
438 mb();
439 }
440
441 void
ahd_outw_atomic(struct ahd_softc * ahd,long port,uint16_t val)442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
443 {
444 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
445 writew(val, ahd->bshs[0].maddr + port);
446 } else {
447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
448 }
449 mb();
450 }
451
452 void
ahd_outsb(struct ahd_softc * ahd,long port,uint8_t * array,int count)453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
454 {
455 int i;
456
457 /*
458 * There is probably a more efficient way to do this on Linux
459 * but we don't use this for anything speed critical and this
460 * should work.
461 */
462 for (i = 0; i < count; i++)
463 ahd_outb(ahd, port, *array++);
464 }
465
466 void
ahd_insb(struct ahd_softc * ahd,long port,uint8_t * array,int count)467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
468 {
469 int i;
470
471 /*
472 * There is probably a more efficient way to do this on Linux
473 * but we don't use this for anything speed critical and this
474 * should work.
475 */
476 for (i = 0; i < count; i++)
477 *array++ = ahd_inb(ahd, port);
478 }
479
480 /******************************* PCI Routines *********************************/
481 uint32_t
ahd_pci_read_config(ahd_dev_softc_t pci,int reg,int width)482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
483 {
484 switch (width) {
485 case 1:
486 {
487 uint8_t retval;
488
489 pci_read_config_byte(pci, reg, &retval);
490 return (retval);
491 }
492 case 2:
493 {
494 uint16_t retval;
495 pci_read_config_word(pci, reg, &retval);
496 return (retval);
497 }
498 case 4:
499 {
500 uint32_t retval;
501 pci_read_config_dword(pci, reg, &retval);
502 return (retval);
503 }
504 default:
505 panic("ahd_pci_read_config: Read size too big");
506 /* NOTREACHED */
507 return (0);
508 }
509 }
510
511 void
ahd_pci_write_config(ahd_dev_softc_t pci,int reg,uint32_t value,int width)512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
513 {
514 switch (width) {
515 case 1:
516 pci_write_config_byte(pci, reg, value);
517 break;
518 case 2:
519 pci_write_config_word(pci, reg, value);
520 break;
521 case 4:
522 pci_write_config_dword(pci, reg, value);
523 break;
524 default:
525 panic("ahd_pci_write_config: Write size too big");
526 /* NOTREACHED */
527 }
528 }
529
530 /****************************** Inlines ***************************************/
531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
532
533 static void
ahd_linux_unmap_scb(struct ahd_softc * ahd,struct scb * scb)534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
535 {
536 struct scsi_cmnd *cmd;
537
538 cmd = scb->io_ctx;
539 if (cmd) {
540 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
541 scsi_dma_unmap(cmd);
542 }
543 }
544
545 /******************************** Macros **************************************/
ahd_build_scsiid(struct ahd_softc * ahd,struct scsi_device * sdev)546 static inline unsigned int ahd_build_scsiid(struct ahd_softc *ahd,
547 struct scsi_device *sdev)
548 {
549 return ((sdev_id(sdev) << TID_SHIFT) & TID) | (ahd)->our_id;
550 }
551
552 /*
553 * Return a string describing the driver.
554 */
555 static const char *
ahd_linux_info(struct Scsi_Host * host)556 ahd_linux_info(struct Scsi_Host *host)
557 {
558 static char buffer[512];
559 char ahd_info[256];
560 char *bp;
561 struct ahd_softc *ahd;
562
563 bp = &buffer[0];
564 ahd = *(struct ahd_softc **)host->hostdata;
565 memset(bp, 0, sizeof(buffer));
566 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
567 " <");
568 strcat(bp, ahd->description);
569 strcat(bp, ">\n"
570 " ");
571 ahd_controller_info(ahd, ahd_info);
572 strcat(bp, ahd_info);
573
574 return (bp);
575 }
576
577 /*
578 * Queue an SCB to the controller.
579 */
ahd_linux_queue_lck(struct scsi_cmnd * cmd)580 static int ahd_linux_queue_lck(struct scsi_cmnd *cmd)
581 {
582 struct ahd_softc *ahd;
583 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
584 int rtn = SCSI_MLQUEUE_HOST_BUSY;
585
586 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
587
588 cmd->result = CAM_REQ_INPROG << 16;
589 rtn = ahd_linux_run_command(ahd, dev, cmd);
590
591 return rtn;
592 }
593
DEF_SCSI_QCMD(ahd_linux_queue)594 static DEF_SCSI_QCMD(ahd_linux_queue)
595
596 static struct scsi_target **
597 ahd_linux_target_in_softc(struct scsi_target *starget)
598 {
599 struct ahd_softc *ahd =
600 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
601 unsigned int target_offset;
602
603 target_offset = starget->id;
604 if (starget->channel != 0)
605 target_offset += 8;
606
607 return &ahd->platform_data->starget[target_offset];
608 }
609
610 static int
ahd_linux_target_alloc(struct scsi_target * starget)611 ahd_linux_target_alloc(struct scsi_target *starget)
612 {
613 struct ahd_softc *ahd =
614 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
615 struct seeprom_config *sc = ahd->seep_config;
616 unsigned long flags;
617 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
618 struct ahd_devinfo devinfo;
619 struct ahd_initiator_tinfo *tinfo;
620 struct ahd_tmode_tstate *tstate;
621 char channel = starget->channel + 'A';
622
623 ahd_lock(ahd, &flags);
624
625 BUG_ON(*ahd_targp != NULL);
626
627 *ahd_targp = starget;
628
629 if (sc) {
630 int flags = sc->device_flags[starget->id];
631
632 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
633 starget->id, &tstate);
634
635 if ((flags & CFPACKETIZED) == 0) {
636 /* don't negotiate packetized (IU) transfers */
637 spi_max_iu(starget) = 0;
638 } else {
639 if ((ahd->features & AHD_RTI) == 0)
640 spi_rti(starget) = 0;
641 }
642
643 if ((flags & CFQAS) == 0)
644 spi_max_qas(starget) = 0;
645
646 /* Transinfo values have been set to BIOS settings */
647 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
648 spi_min_period(starget) = tinfo->user.period;
649 spi_max_offset(starget) = tinfo->user.offset;
650 }
651
652 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
653 starget->id, &tstate);
654 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
655 CAM_LUN_WILDCARD, channel,
656 ROLE_INITIATOR);
657 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
658 AHD_TRANS_GOAL, /*paused*/FALSE);
659 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
660 AHD_TRANS_GOAL, /*paused*/FALSE);
661 ahd_unlock(ahd, &flags);
662
663 return 0;
664 }
665
666 static void
ahd_linux_target_destroy(struct scsi_target * starget)667 ahd_linux_target_destroy(struct scsi_target *starget)
668 {
669 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
670
671 *ahd_targp = NULL;
672 }
673
674 static int
ahd_linux_slave_alloc(struct scsi_device * sdev)675 ahd_linux_slave_alloc(struct scsi_device *sdev)
676 {
677 struct ahd_softc *ahd =
678 *((struct ahd_softc **)sdev->host->hostdata);
679 struct ahd_linux_device *dev;
680
681 if (bootverbose)
682 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
683
684 dev = scsi_transport_device_data(sdev);
685 memset(dev, 0, sizeof(*dev));
686
687 /*
688 * We start out life using untagged
689 * transactions of which we allow one.
690 */
691 dev->openings = 1;
692
693 /*
694 * Set maxtags to 0. This will be changed if we
695 * later determine that we are dealing with
696 * a tagged queuing capable device.
697 */
698 dev->maxtags = 0;
699
700 return (0);
701 }
702
703 static int
ahd_linux_slave_configure(struct scsi_device * sdev)704 ahd_linux_slave_configure(struct scsi_device *sdev)
705 {
706 if (bootverbose)
707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
708
709 ahd_linux_device_queue_depth(sdev);
710
711 /* Initial Domain Validation */
712 if (!spi_initial_dv(sdev->sdev_target))
713 spi_dv_device(sdev);
714
715 return 0;
716 }
717
718 #if defined(__i386__)
719 /*
720 * Return the disk geometry for the given SCSI device.
721 */
722 static int
ahd_linux_biosparam(struct scsi_device * sdev,struct block_device * bdev,sector_t capacity,int geom[])723 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
724 sector_t capacity, int geom[])
725 {
726 int heads;
727 int sectors;
728 int cylinders;
729 int extended;
730 struct ahd_softc *ahd;
731
732 ahd = *((struct ahd_softc **)sdev->host->hostdata);
733
734 if (scsi_partsize(bdev, capacity, geom))
735 return 0;
736
737 heads = 64;
738 sectors = 32;
739 cylinders = aic_sector_div(capacity, heads, sectors);
740
741 if (aic79xx_extended != 0)
742 extended = 1;
743 else
744 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
745 if (extended && cylinders >= 1024) {
746 heads = 255;
747 sectors = 63;
748 cylinders = aic_sector_div(capacity, heads, sectors);
749 }
750 geom[0] = heads;
751 geom[1] = sectors;
752 geom[2] = cylinders;
753 return (0);
754 }
755 #endif
756
757 /*
758 * Abort the current SCSI command(s).
759 */
760 static int
ahd_linux_abort(struct scsi_cmnd * cmd)761 ahd_linux_abort(struct scsi_cmnd *cmd)
762 {
763 return ahd_linux_queue_abort_cmd(cmd);
764 }
765
766 /*
767 * Attempt to send a target reset message to the device that timed out.
768 */
769 static int
ahd_linux_dev_reset(struct scsi_cmnd * cmd)770 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
771 {
772 struct ahd_softc *ahd;
773 struct ahd_linux_device *dev;
774 struct scb *reset_scb;
775 u_int cdb_byte;
776 int retval = SUCCESS;
777 struct ahd_initiator_tinfo *tinfo;
778 struct ahd_tmode_tstate *tstate;
779 unsigned long flags;
780 DECLARE_COMPLETION_ONSTACK(done);
781
782 reset_scb = NULL;
783
784 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
785
786 scmd_printk(KERN_INFO, cmd,
787 "Attempting to queue a TARGET RESET message:");
788
789 printk("CDB:");
790 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
791 printk(" 0x%x", cmd->cmnd[cdb_byte]);
792 printk("\n");
793
794 /*
795 * Determine if we currently own this command.
796 */
797 dev = scsi_transport_device_data(cmd->device);
798
799 if (dev == NULL) {
800 /*
801 * No target device for this command exists,
802 * so we must not still own the command.
803 */
804 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
805 return SUCCESS;
806 }
807
808 /*
809 * Generate us a new SCB
810 */
811 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
812 if (!reset_scb) {
813 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
814 return FAILED;
815 }
816
817 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
818 cmd->device->id, &tstate);
819 reset_scb->io_ctx = NULL;
820 reset_scb->platform_data->dev = dev;
821 reset_scb->sg_count = 0;
822 ahd_set_residual(reset_scb, 0);
823 ahd_set_sense_residual(reset_scb, 0);
824 reset_scb->platform_data->xfer_len = 0;
825 reset_scb->hscb->control = 0;
826 reset_scb->hscb->scsiid = ahd_build_scsiid(ahd, cmd->device);
827 reset_scb->hscb->lun = cmd->device->lun;
828 reset_scb->hscb->cdb_len = 0;
829 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
830 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
831 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
832 reset_scb->flags |= SCB_PACKETIZED;
833 } else {
834 reset_scb->hscb->control |= MK_MESSAGE;
835 }
836 dev->openings--;
837 dev->active++;
838 dev->commands_issued++;
839
840 ahd_lock(ahd, &flags);
841
842 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
843 ahd_queue_scb(ahd, reset_scb);
844
845 ahd->platform_data->eh_done = &done;
846 ahd_unlock(ahd, &flags);
847
848 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
849 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
850 ahd_lock(ahd, &flags);
851 ahd->platform_data->eh_done = NULL;
852 ahd_unlock(ahd, &flags);
853 printk("%s: Device reset timer expired (active %d)\n",
854 ahd_name(ahd), dev->active);
855 retval = FAILED;
856 }
857 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
858
859 return (retval);
860 }
861
862 /*
863 * Reset the SCSI bus.
864 */
865 static int
ahd_linux_bus_reset(struct scsi_cmnd * cmd)866 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
867 {
868 struct ahd_softc *ahd;
869 int found;
870 unsigned long flags;
871
872 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
873 #ifdef AHD_DEBUG
874 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
875 printk("%s: Bus reset called for cmd %p\n",
876 ahd_name(ahd), cmd);
877 #endif
878 ahd_lock(ahd, &flags);
879
880 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
881 /*initiate reset*/TRUE);
882 ahd_unlock(ahd, &flags);
883
884 if (bootverbose)
885 printk("%s: SCSI bus reset delivered. "
886 "%d SCBs aborted.\n", ahd_name(ahd), found);
887
888 return (SUCCESS);
889 }
890
891 struct scsi_host_template aic79xx_driver_template = {
892 .module = THIS_MODULE,
893 .name = "aic79xx",
894 .proc_name = "aic79xx",
895 .show_info = ahd_linux_show_info,
896 .write_info = ahd_proc_write_seeprom,
897 .info = ahd_linux_info,
898 .queuecommand = ahd_linux_queue,
899 .eh_abort_handler = ahd_linux_abort,
900 .eh_device_reset_handler = ahd_linux_dev_reset,
901 .eh_bus_reset_handler = ahd_linux_bus_reset,
902 #if defined(__i386__)
903 .bios_param = ahd_linux_biosparam,
904 #endif
905 .can_queue = AHD_MAX_QUEUE,
906 .this_id = -1,
907 .max_sectors = 8192,
908 .cmd_per_lun = 2,
909 .slave_alloc = ahd_linux_slave_alloc,
910 .slave_configure = ahd_linux_slave_configure,
911 .target_alloc = ahd_linux_target_alloc,
912 .target_destroy = ahd_linux_target_destroy,
913 };
914
915 /******************************** Bus DMA *************************************/
916 int
ahd_dma_tag_create(struct ahd_softc * ahd,bus_dma_tag_t parent,bus_size_t alignment,bus_size_t boundary,dma_addr_t lowaddr,dma_addr_t highaddr,bus_dma_filter_t * filter,void * filterarg,bus_size_t maxsize,int nsegments,bus_size_t maxsegsz,int flags,bus_dma_tag_t * ret_tag)917 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
918 bus_size_t alignment, bus_size_t boundary,
919 dma_addr_t lowaddr, dma_addr_t highaddr,
920 bus_dma_filter_t *filter, void *filterarg,
921 bus_size_t maxsize, int nsegments,
922 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
923 {
924 bus_dma_tag_t dmat;
925
926 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
927 if (dmat == NULL)
928 return (ENOMEM);
929
930 /*
931 * Linux is very simplistic about DMA memory. For now don't
932 * maintain all specification information. Once Linux supplies
933 * better facilities for doing these operations, or the
934 * needs of this particular driver change, we might need to do
935 * more here.
936 */
937 dmat->alignment = alignment;
938 dmat->boundary = boundary;
939 dmat->maxsize = maxsize;
940 *ret_tag = dmat;
941 return (0);
942 }
943
944 void
ahd_dma_tag_destroy(struct ahd_softc * ahd,bus_dma_tag_t dmat)945 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
946 {
947 kfree(dmat);
948 }
949
950 int
ahd_dmamem_alloc(struct ahd_softc * ahd,bus_dma_tag_t dmat,void ** vaddr,int flags,bus_dmamap_t * mapp)951 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
952 int flags, bus_dmamap_t *mapp)
953 {
954 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp,
955 GFP_ATOMIC);
956 if (*vaddr == NULL)
957 return (ENOMEM);
958 return(0);
959 }
960
961 void
ahd_dmamem_free(struct ahd_softc * ahd,bus_dma_tag_t dmat,void * vaddr,bus_dmamap_t map)962 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
963 void* vaddr, bus_dmamap_t map)
964 {
965 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map);
966 }
967
968 int
ahd_dmamap_load(struct ahd_softc * ahd,bus_dma_tag_t dmat,bus_dmamap_t map,void * buf,bus_size_t buflen,bus_dmamap_callback_t * cb,void * cb_arg,int flags)969 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
970 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
971 void *cb_arg, int flags)
972 {
973 /*
974 * Assume for now that this will only be used during
975 * initialization and not for per-transaction buffer mapping.
976 */
977 bus_dma_segment_t stack_sg;
978
979 stack_sg.ds_addr = map;
980 stack_sg.ds_len = dmat->maxsize;
981 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
982 return (0);
983 }
984
985 void
ahd_dmamap_destroy(struct ahd_softc * ahd,bus_dma_tag_t dmat,bus_dmamap_t map)986 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
987 {
988 }
989
990 int
ahd_dmamap_unload(struct ahd_softc * ahd,bus_dma_tag_t dmat,bus_dmamap_t map)991 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
992 {
993 /* Nothing to do */
994 return (0);
995 }
996
997 /********************* Platform Dependent Functions ***************************/
998 static void
ahd_linux_setup_iocell_info(u_long index,int instance,int targ,int32_t value)999 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1000 {
1001
1002 if ((instance >= 0)
1003 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1004 uint8_t *iocell_info;
1005
1006 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1007 iocell_info[index] = value & 0xFFFF;
1008 if (bootverbose)
1009 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1010 }
1011 }
1012
1013 static void
ahd_linux_setup_tag_info_global(char * p)1014 ahd_linux_setup_tag_info_global(char *p)
1015 {
1016 int tags, i, j;
1017
1018 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1019 printk("Setting Global Tags= %d\n", tags);
1020
1021 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1022 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1023 aic79xx_tag_info[i].tag_commands[j] = tags;
1024 }
1025 }
1026 }
1027
1028 static void
ahd_linux_setup_tag_info(u_long arg,int instance,int targ,int32_t value)1029 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1030 {
1031
1032 if ((instance >= 0) && (targ >= 0)
1033 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1034 && (targ < AHD_NUM_TARGETS)) {
1035 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1036 if (bootverbose)
1037 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1038 }
1039 }
1040
1041 static char *
ahd_parse_brace_option(char * opt_name,char * opt_arg,char * end,int depth,void (* callback)(u_long,int,int,int32_t),u_long callback_arg)1042 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1043 void (*callback)(u_long, int, int, int32_t),
1044 u_long callback_arg)
1045 {
1046 char *tok_end;
1047 char *tok_end2;
1048 int i;
1049 int instance;
1050 int targ;
1051 int done;
1052 char tok_list[] = {'.', ',', '{', '}', '\0'};
1053
1054 /* All options use a ':' name/arg separator */
1055 if (*opt_arg != ':')
1056 return (opt_arg);
1057 opt_arg++;
1058 instance = -1;
1059 targ = -1;
1060 done = FALSE;
1061 /*
1062 * Restore separator that may be in
1063 * the middle of our option argument.
1064 */
1065 tok_end = strchr(opt_arg, '\0');
1066 if (tok_end < end)
1067 *tok_end = ',';
1068 while (!done) {
1069 switch (*opt_arg) {
1070 case '{':
1071 if (instance == -1) {
1072 instance = 0;
1073 } else {
1074 if (depth > 1) {
1075 if (targ == -1)
1076 targ = 0;
1077 } else {
1078 printk("Malformed Option %s\n",
1079 opt_name);
1080 done = TRUE;
1081 }
1082 }
1083 opt_arg++;
1084 break;
1085 case '}':
1086 if (targ != -1)
1087 targ = -1;
1088 else if (instance != -1)
1089 instance = -1;
1090 opt_arg++;
1091 break;
1092 case ',':
1093 case '.':
1094 if (instance == -1)
1095 done = TRUE;
1096 else if (targ >= 0)
1097 targ++;
1098 else if (instance >= 0)
1099 instance++;
1100 opt_arg++;
1101 break;
1102 case '\0':
1103 done = TRUE;
1104 break;
1105 default:
1106 tok_end = end;
1107 for (i = 0; tok_list[i]; i++) {
1108 tok_end2 = strchr(opt_arg, tok_list[i]);
1109 if ((tok_end2) && (tok_end2 < tok_end))
1110 tok_end = tok_end2;
1111 }
1112 callback(callback_arg, instance, targ,
1113 simple_strtol(opt_arg, NULL, 0));
1114 opt_arg = tok_end;
1115 break;
1116 }
1117 }
1118 return (opt_arg);
1119 }
1120
1121 /*
1122 * Handle Linux boot parameters. This routine allows for assigning a value
1123 * to a parameter with a ':' between the parameter and the value.
1124 * ie. aic79xx=stpwlev:1,extended
1125 */
1126 static int
aic79xx_setup(char * s)1127 aic79xx_setup(char *s)
1128 {
1129 int i, n;
1130 char *p;
1131 char *end;
1132
1133 static const struct {
1134 const char *name;
1135 uint32_t *flag;
1136 } options[] = {
1137 { "extended", &aic79xx_extended },
1138 { "no_reset", &aic79xx_no_reset },
1139 { "verbose", &aic79xx_verbose },
1140 { "allow_memio", &aic79xx_allow_memio},
1141 #ifdef AHD_DEBUG
1142 { "debug", &ahd_debug },
1143 #endif
1144 { "periodic_otag", &aic79xx_periodic_otag },
1145 { "pci_parity", &aic79xx_pci_parity },
1146 { "seltime", &aic79xx_seltime },
1147 { "tag_info", NULL },
1148 { "global_tag_depth", NULL},
1149 { "slewrate", NULL },
1150 { "precomp", NULL },
1151 { "amplitude", NULL },
1152 { "slowcrc", &aic79xx_slowcrc },
1153 };
1154
1155 end = strchr(s, '\0');
1156
1157 /*
1158 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1159 * will never be 0 in this case.
1160 */
1161 n = 0;
1162
1163 while ((p = strsep(&s, ",.")) != NULL) {
1164 if (*p == '\0')
1165 continue;
1166 for (i = 0; i < ARRAY_SIZE(options); i++) {
1167
1168 n = strlen(options[i].name);
1169 if (strncmp(options[i].name, p, n) == 0)
1170 break;
1171 }
1172 if (i == ARRAY_SIZE(options))
1173 continue;
1174
1175 if (strncmp(p, "global_tag_depth", n) == 0) {
1176 ahd_linux_setup_tag_info_global(p + n);
1177 } else if (strncmp(p, "tag_info", n) == 0) {
1178 s = ahd_parse_brace_option("tag_info", p + n, end,
1179 2, ahd_linux_setup_tag_info, 0);
1180 } else if (strncmp(p, "slewrate", n) == 0) {
1181 s = ahd_parse_brace_option("slewrate",
1182 p + n, end, 1, ahd_linux_setup_iocell_info,
1183 AIC79XX_SLEWRATE_INDEX);
1184 } else if (strncmp(p, "precomp", n) == 0) {
1185 s = ahd_parse_brace_option("precomp",
1186 p + n, end, 1, ahd_linux_setup_iocell_info,
1187 AIC79XX_PRECOMP_INDEX);
1188 } else if (strncmp(p, "amplitude", n) == 0) {
1189 s = ahd_parse_brace_option("amplitude",
1190 p + n, end, 1, ahd_linux_setup_iocell_info,
1191 AIC79XX_AMPLITUDE_INDEX);
1192 } else if (p[n] == ':') {
1193 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1194 } else if (!strncmp(p, "verbose", n)) {
1195 *(options[i].flag) = 1;
1196 } else {
1197 *(options[i].flag) ^= 0xFFFFFFFF;
1198 }
1199 }
1200 return 1;
1201 }
1202
1203 __setup("aic79xx=", aic79xx_setup);
1204
1205 uint32_t aic79xx_verbose;
1206
1207 int
ahd_linux_register_host(struct ahd_softc * ahd,struct scsi_host_template * template)1208 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1209 {
1210 char buf[80];
1211 struct Scsi_Host *host;
1212 char *new_name;
1213 u_long s;
1214 int retval;
1215
1216 template->name = ahd->description;
1217 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1218 if (host == NULL)
1219 return (ENOMEM);
1220
1221 *((struct ahd_softc **)host->hostdata) = ahd;
1222 ahd->platform_data->host = host;
1223 host->can_queue = AHD_MAX_QUEUE;
1224 host->cmd_per_lun = 2;
1225 host->sg_tablesize = AHD_NSEG;
1226 host->this_id = ahd->our_id;
1227 host->irq = ahd->platform_data->irq;
1228 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1229 host->max_lun = AHD_NUM_LUNS;
1230 host->max_channel = 0;
1231 host->sg_tablesize = AHD_NSEG;
1232 ahd_lock(ahd, &s);
1233 ahd_set_unit(ahd, ahd_linux_unit++);
1234 ahd_unlock(ahd, &s);
1235 sprintf(buf, "scsi%d", host->host_no);
1236 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1237 if (new_name != NULL) {
1238 strcpy(new_name, buf);
1239 ahd_set_name(ahd, new_name);
1240 }
1241 host->unique_id = ahd->unit;
1242 ahd_linux_initialize_scsi_bus(ahd);
1243 ahd_intr_enable(ahd, TRUE);
1244
1245 host->transportt = ahd_linux_transport_template;
1246
1247 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1248 if (retval) {
1249 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1250 scsi_host_put(host);
1251 return retval;
1252 }
1253
1254 scsi_scan_host(host);
1255 return 0;
1256 }
1257
1258 /*
1259 * Place the SCSI bus into a known state by either resetting it,
1260 * or forcing transfer negotiations on the next command to any
1261 * target.
1262 */
1263 static void
ahd_linux_initialize_scsi_bus(struct ahd_softc * ahd)1264 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1265 {
1266 u_int target_id;
1267 u_int numtarg;
1268 unsigned long s;
1269
1270 target_id = 0;
1271 numtarg = 0;
1272
1273 if (aic79xx_no_reset != 0)
1274 ahd->flags &= ~AHD_RESET_BUS_A;
1275
1276 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1277 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1278 else
1279 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1280
1281 ahd_lock(ahd, &s);
1282
1283 /*
1284 * Force negotiation to async for all targets that
1285 * will not see an initial bus reset.
1286 */
1287 for (; target_id < numtarg; target_id++) {
1288 struct ahd_devinfo devinfo;
1289 struct ahd_initiator_tinfo *tinfo;
1290 struct ahd_tmode_tstate *tstate;
1291
1292 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1293 target_id, &tstate);
1294 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1295 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1296 ahd_update_neg_request(ahd, &devinfo, tstate,
1297 tinfo, AHD_NEG_ALWAYS);
1298 }
1299 ahd_unlock(ahd, &s);
1300 /* Give the bus some time to recover */
1301 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1302 ahd_freeze_simq(ahd);
1303 msleep(AIC79XX_RESET_DELAY);
1304 ahd_release_simq(ahd);
1305 }
1306 }
1307
1308 int
ahd_platform_alloc(struct ahd_softc * ahd,void * platform_arg)1309 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1310 {
1311 ahd->platform_data =
1312 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1313 if (ahd->platform_data == NULL)
1314 return (ENOMEM);
1315 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1316 ahd_lockinit(ahd);
1317 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1318 return (0);
1319 }
1320
1321 void
ahd_platform_free(struct ahd_softc * ahd)1322 ahd_platform_free(struct ahd_softc *ahd)
1323 {
1324 struct scsi_target *starget;
1325 int i;
1326
1327 if (ahd->platform_data != NULL) {
1328 /* destroy all of the device and target objects */
1329 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1330 starget = ahd->platform_data->starget[i];
1331 if (starget != NULL) {
1332 ahd->platform_data->starget[i] = NULL;
1333 }
1334 }
1335
1336 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1337 free_irq(ahd->platform_data->irq, ahd);
1338 if (ahd->tags[0] == BUS_SPACE_PIO
1339 && ahd->bshs[0].ioport != 0)
1340 release_region(ahd->bshs[0].ioport, 256);
1341 if (ahd->tags[1] == BUS_SPACE_PIO
1342 && ahd->bshs[1].ioport != 0)
1343 release_region(ahd->bshs[1].ioport, 256);
1344 if (ahd->tags[0] == BUS_SPACE_MEMIO
1345 && ahd->bshs[0].maddr != NULL) {
1346 iounmap(ahd->bshs[0].maddr);
1347 release_mem_region(ahd->platform_data->mem_busaddr,
1348 0x1000);
1349 }
1350 if (ahd->platform_data->host)
1351 scsi_host_put(ahd->platform_data->host);
1352
1353 kfree(ahd->platform_data);
1354 }
1355 }
1356
1357 void
ahd_platform_init(struct ahd_softc * ahd)1358 ahd_platform_init(struct ahd_softc *ahd)
1359 {
1360 /*
1361 * Lookup and commit any modified IO Cell options.
1362 */
1363 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1364 const struct ahd_linux_iocell_opts *iocell_opts;
1365
1366 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1367 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1368 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1369 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1370 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1371 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1372 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1373 }
1374
1375 }
1376
1377 void
ahd_platform_freeze_devq(struct ahd_softc * ahd,struct scb * scb)1378 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1379 {
1380 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1381 SCB_GET_CHANNEL(ahd, scb),
1382 SCB_GET_LUN(scb), SCB_LIST_NULL,
1383 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1384 }
1385
1386 void
ahd_platform_set_tags(struct ahd_softc * ahd,struct scsi_device * sdev,struct ahd_devinfo * devinfo,ahd_queue_alg alg)1387 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1388 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1389 {
1390 struct ahd_linux_device *dev;
1391 int was_queuing;
1392 int now_queuing;
1393
1394 if (sdev == NULL)
1395 return;
1396
1397 dev = scsi_transport_device_data(sdev);
1398
1399 if (dev == NULL)
1400 return;
1401 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1402 switch (alg) {
1403 default:
1404 case AHD_QUEUE_NONE:
1405 now_queuing = 0;
1406 break;
1407 case AHD_QUEUE_BASIC:
1408 now_queuing = AHD_DEV_Q_BASIC;
1409 break;
1410 case AHD_QUEUE_TAGGED:
1411 now_queuing = AHD_DEV_Q_TAGGED;
1412 break;
1413 }
1414 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1415 && (was_queuing != now_queuing)
1416 && (dev->active != 0)) {
1417 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1418 dev->qfrozen++;
1419 }
1420
1421 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1422 if (now_queuing) {
1423 u_int usertags;
1424
1425 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1426 if (!was_queuing) {
1427 /*
1428 * Start out aggressively and allow our
1429 * dynamic queue depth algorithm to take
1430 * care of the rest.
1431 */
1432 dev->maxtags = usertags;
1433 dev->openings = dev->maxtags - dev->active;
1434 }
1435 if (dev->maxtags == 0) {
1436 /*
1437 * Queueing is disabled by the user.
1438 */
1439 dev->openings = 1;
1440 } else if (alg == AHD_QUEUE_TAGGED) {
1441 dev->flags |= AHD_DEV_Q_TAGGED;
1442 if (aic79xx_periodic_otag != 0)
1443 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1444 } else
1445 dev->flags |= AHD_DEV_Q_BASIC;
1446 } else {
1447 /* We can only have one opening. */
1448 dev->maxtags = 0;
1449 dev->openings = 1 - dev->active;
1450 }
1451
1452 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1453 case AHD_DEV_Q_BASIC:
1454 case AHD_DEV_Q_TAGGED:
1455 scsi_change_queue_depth(sdev,
1456 dev->openings + dev->active);
1457 break;
1458 default:
1459 /*
1460 * We allow the OS to queue 2 untagged transactions to
1461 * us at any time even though we can only execute them
1462 * serially on the controller/device. This should
1463 * remove some latency.
1464 */
1465 scsi_change_queue_depth(sdev, 1);
1466 break;
1467 }
1468 }
1469
1470 int
ahd_platform_abort_scbs(struct ahd_softc * ahd,int target,char channel,int lun,u_int tag,role_t role,uint32_t status)1471 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1472 int lun, u_int tag, role_t role, uint32_t status)
1473 {
1474 return 0;
1475 }
1476
1477 static u_int
ahd_linux_user_tagdepth(struct ahd_softc * ahd,struct ahd_devinfo * devinfo)1478 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1479 {
1480 static int warned_user;
1481 u_int tags;
1482
1483 tags = 0;
1484 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1485 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1486
1487 if (warned_user == 0) {
1488 printk(KERN_WARNING
1489 "aic79xx: WARNING: Insufficient tag_info instances\n"
1490 "aic79xx: for installed controllers. Using defaults\n"
1491 "aic79xx: Please update the aic79xx_tag_info array in\n"
1492 "aic79xx: the aic79xx_osm.c source file.\n");
1493 warned_user++;
1494 }
1495 tags = AHD_MAX_QUEUE;
1496 } else {
1497 adapter_tag_info_t *tag_info;
1498
1499 tag_info = &aic79xx_tag_info[ahd->unit];
1500 tags = tag_info->tag_commands[devinfo->target_offset];
1501 if (tags > AHD_MAX_QUEUE)
1502 tags = AHD_MAX_QUEUE;
1503 }
1504 }
1505 return (tags);
1506 }
1507
1508 /*
1509 * Determines the queue depth for a given device.
1510 */
1511 static void
ahd_linux_device_queue_depth(struct scsi_device * sdev)1512 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1513 {
1514 struct ahd_devinfo devinfo;
1515 u_int tags;
1516 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1517
1518 ahd_compile_devinfo(&devinfo,
1519 ahd->our_id,
1520 sdev->sdev_target->id, sdev->lun,
1521 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1522 ROLE_INITIATOR);
1523 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1524 if (tags != 0 && sdev->tagged_supported != 0) {
1525
1526 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1527 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1528 devinfo.lun, AC_TRANSFER_NEG);
1529 ahd_print_devinfo(ahd, &devinfo);
1530 printk("Tagged Queuing enabled. Depth %d\n", tags);
1531 } else {
1532 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1533 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1534 devinfo.lun, AC_TRANSFER_NEG);
1535 }
1536 }
1537
1538 static int
ahd_linux_run_command(struct ahd_softc * ahd,struct ahd_linux_device * dev,struct scsi_cmnd * cmd)1539 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1540 struct scsi_cmnd *cmd)
1541 {
1542 struct scb *scb;
1543 struct hardware_scb *hscb;
1544 struct ahd_initiator_tinfo *tinfo;
1545 struct ahd_tmode_tstate *tstate;
1546 u_int col_idx;
1547 uint16_t mask;
1548 unsigned long flags;
1549 int nseg;
1550
1551 nseg = scsi_dma_map(cmd);
1552 if (nseg < 0)
1553 return SCSI_MLQUEUE_HOST_BUSY;
1554
1555 ahd_lock(ahd, &flags);
1556
1557 /*
1558 * Get an scb to use.
1559 */
1560 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1561 cmd->device->id, &tstate);
1562 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1563 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1564 col_idx = AHD_NEVER_COL_IDX;
1565 } else {
1566 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1567 cmd->device->lun);
1568 }
1569 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1570 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1571 ahd_unlock(ahd, &flags);
1572 scsi_dma_unmap(cmd);
1573 return SCSI_MLQUEUE_HOST_BUSY;
1574 }
1575
1576 scb->io_ctx = cmd;
1577 scb->platform_data->dev = dev;
1578 hscb = scb->hscb;
1579 cmd->host_scribble = (char *)scb;
1580
1581 /*
1582 * Fill out basics of the HSCB.
1583 */
1584 hscb->control = 0;
1585 hscb->scsiid = ahd_build_scsiid(ahd, cmd->device);
1586 hscb->lun = cmd->device->lun;
1587 scb->hscb->task_management = 0;
1588 mask = SCB_GET_TARGET_MASK(ahd, scb);
1589
1590 if ((ahd->user_discenable & mask) != 0)
1591 hscb->control |= DISCENB;
1592
1593 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1594 scb->flags |= SCB_PACKETIZED;
1595
1596 if ((tstate->auto_negotiate & mask) != 0) {
1597 scb->flags |= SCB_AUTO_NEGOTIATE;
1598 scb->hscb->control |= MK_MESSAGE;
1599 }
1600
1601 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1602 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1603 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1604 hscb->control |= ORDERED_QUEUE_TAG;
1605 dev->commands_since_idle_or_otag = 0;
1606 } else {
1607 hscb->control |= SIMPLE_QUEUE_TAG;
1608 }
1609 }
1610
1611 hscb->cdb_len = cmd->cmd_len;
1612 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1613
1614 scb->platform_data->xfer_len = 0;
1615 ahd_set_residual(scb, 0);
1616 ahd_set_sense_residual(scb, 0);
1617 scb->sg_count = 0;
1618
1619 if (nseg > 0) {
1620 void *sg = scb->sg_list;
1621 struct scatterlist *cur_seg;
1622 int i;
1623
1624 scb->platform_data->xfer_len = 0;
1625
1626 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1627 dma_addr_t addr;
1628 bus_size_t len;
1629
1630 addr = sg_dma_address(cur_seg);
1631 len = sg_dma_len(cur_seg);
1632 scb->platform_data->xfer_len += len;
1633 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1634 i == (nseg - 1));
1635 }
1636 }
1637
1638 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1639 dev->openings--;
1640 dev->active++;
1641 dev->commands_issued++;
1642
1643 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1644 dev->commands_since_idle_or_otag++;
1645 scb->flags |= SCB_ACTIVE;
1646 ahd_queue_scb(ahd, scb);
1647
1648 ahd_unlock(ahd, &flags);
1649
1650 return 0;
1651 }
1652
1653 /*
1654 * SCSI controller interrupt handler.
1655 */
1656 irqreturn_t
ahd_linux_isr(int irq,void * dev_id)1657 ahd_linux_isr(int irq, void *dev_id)
1658 {
1659 struct ahd_softc *ahd;
1660 u_long flags;
1661 int ours;
1662
1663 ahd = (struct ahd_softc *) dev_id;
1664 ahd_lock(ahd, &flags);
1665 ours = ahd_intr(ahd);
1666 ahd_unlock(ahd, &flags);
1667 return IRQ_RETVAL(ours);
1668 }
1669
1670 void
ahd_send_async(struct ahd_softc * ahd,char channel,u_int target,u_int lun,ac_code code)1671 ahd_send_async(struct ahd_softc *ahd, char channel,
1672 u_int target, u_int lun, ac_code code)
1673 {
1674 switch (code) {
1675 case AC_TRANSFER_NEG:
1676 {
1677 struct scsi_target *starget;
1678 struct ahd_initiator_tinfo *tinfo;
1679 struct ahd_tmode_tstate *tstate;
1680 unsigned int target_ppr_options;
1681
1682 BUG_ON(target == CAM_TARGET_WILDCARD);
1683
1684 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1685 target, &tstate);
1686
1687 /*
1688 * Don't bother reporting results while
1689 * negotiations are still pending.
1690 */
1691 if (tinfo->curr.period != tinfo->goal.period
1692 || tinfo->curr.width != tinfo->goal.width
1693 || tinfo->curr.offset != tinfo->goal.offset
1694 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1695 if (bootverbose == 0)
1696 break;
1697
1698 /*
1699 * Don't bother reporting results that
1700 * are identical to those last reported.
1701 */
1702 starget = ahd->platform_data->starget[target];
1703 if (starget == NULL)
1704 break;
1705
1706 target_ppr_options =
1707 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1708 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1709 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1710 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1711 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1712 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1713 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1714 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1715
1716 if (tinfo->curr.period == spi_period(starget)
1717 && tinfo->curr.width == spi_width(starget)
1718 && tinfo->curr.offset == spi_offset(starget)
1719 && tinfo->curr.ppr_options == target_ppr_options)
1720 if (bootverbose == 0)
1721 break;
1722
1723 spi_period(starget) = tinfo->curr.period;
1724 spi_width(starget) = tinfo->curr.width;
1725 spi_offset(starget) = tinfo->curr.offset;
1726 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1727 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1728 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1729 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1730 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1731 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1732 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1733 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1734 spi_display_xfer_agreement(starget);
1735 break;
1736 }
1737 case AC_SENT_BDR:
1738 {
1739 WARN_ON(lun != CAM_LUN_WILDCARD);
1740 scsi_report_device_reset(ahd->platform_data->host,
1741 channel - 'A', target);
1742 break;
1743 }
1744 case AC_BUS_RESET:
1745 if (ahd->platform_data->host != NULL) {
1746 scsi_report_bus_reset(ahd->platform_data->host,
1747 channel - 'A');
1748 }
1749 break;
1750 default:
1751 panic("ahd_send_async: Unexpected async event");
1752 }
1753 }
1754
1755 /*
1756 * Calls the higher level scsi done function and frees the scb.
1757 */
1758 void
ahd_done(struct ahd_softc * ahd,struct scb * scb)1759 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1760 {
1761 struct scsi_cmnd *cmd;
1762 struct ahd_linux_device *dev;
1763
1764 if ((scb->flags & SCB_ACTIVE) == 0) {
1765 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1766 ahd_dump_card_state(ahd);
1767 panic("Stopping for safety");
1768 }
1769 LIST_REMOVE(scb, pending_links);
1770 cmd = scb->io_ctx;
1771 dev = scb->platform_data->dev;
1772 dev->active--;
1773 dev->openings++;
1774 if (cmd) {
1775 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1776 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1777 dev->qfrozen--;
1778 }
1779 } else if (scb->flags & SCB_DEVICE_RESET) {
1780 if (ahd->platform_data->eh_done)
1781 complete(ahd->platform_data->eh_done);
1782 ahd_free_scb(ahd, scb);
1783 return;
1784 }
1785 ahd_linux_unmap_scb(ahd, scb);
1786
1787 /*
1788 * Guard against stale sense data.
1789 * The Linux mid-layer assumes that sense
1790 * was retrieved anytime the first byte of
1791 * the sense buffer looks "sane".
1792 */
1793 cmd->sense_buffer[0] = 0;
1794 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1795 #ifdef AHD_REPORT_UNDERFLOWS
1796 uint32_t amount_xferred;
1797
1798 amount_xferred =
1799 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1800 #endif
1801 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1802 #ifdef AHD_DEBUG
1803 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1804 ahd_print_path(ahd, scb);
1805 printk("Set CAM_UNCOR_PARITY\n");
1806 }
1807 #endif
1808 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1809 #ifdef AHD_REPORT_UNDERFLOWS
1810 /*
1811 * This code is disabled by default as some
1812 * clients of the SCSI system do not properly
1813 * initialize the underflow parameter. This
1814 * results in spurious termination of commands
1815 * that complete as expected (e.g. underflow is
1816 * allowed as command can return variable amounts
1817 * of data.
1818 */
1819 } else if (amount_xferred < scb->io_ctx->underflow) {
1820 u_int i;
1821
1822 ahd_print_path(ahd, scb);
1823 printk("CDB:");
1824 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1825 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1826 printk("\n");
1827 ahd_print_path(ahd, scb);
1828 printk("Saw underflow (%ld of %ld bytes). "
1829 "Treated as error\n",
1830 ahd_get_residual(scb),
1831 ahd_get_transfer_length(scb));
1832 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1833 #endif
1834 } else {
1835 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1836 }
1837 } else if (cmd &&
1838 ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1839 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1840 }
1841
1842 if (dev->openings == 1
1843 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1844 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)
1845 dev->tag_success_count++;
1846 /*
1847 * Some devices deal with temporary internal resource
1848 * shortages by returning queue full. When the queue
1849 * full occurrs, we throttle back. Slowly try to get
1850 * back to our previous queue depth.
1851 */
1852 if ((dev->openings + dev->active) < dev->maxtags
1853 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1854 dev->tag_success_count = 0;
1855 dev->openings++;
1856 }
1857
1858 if (dev->active == 0)
1859 dev->commands_since_idle_or_otag = 0;
1860
1861 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1862 printk("Recovery SCB completes\n");
1863 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1864 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1865 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1866
1867 if (ahd->platform_data->eh_done)
1868 complete(ahd->platform_data->eh_done);
1869 }
1870
1871 ahd_free_scb(ahd, scb);
1872 if (cmd)
1873 ahd_linux_queue_cmd_complete(ahd, cmd);
1874 }
1875
1876 static void
ahd_linux_handle_scsi_status(struct ahd_softc * ahd,struct scsi_device * sdev,struct scb * scb)1877 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1878 struct scsi_device *sdev, struct scb *scb)
1879 {
1880 struct ahd_devinfo devinfo;
1881 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1882
1883 ahd_compile_devinfo(&devinfo,
1884 ahd->our_id,
1885 sdev->sdev_target->id, sdev->lun,
1886 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1887 ROLE_INITIATOR);
1888
1889 /*
1890 * We don't currently trust the mid-layer to
1891 * properly deal with queue full or busy. So,
1892 * when one occurs, we tell the mid-layer to
1893 * unconditionally requeue the command to us
1894 * so that we can retry it ourselves. We also
1895 * implement our own throttling mechanism so
1896 * we don't clobber the device with too many
1897 * commands.
1898 */
1899 switch (ahd_get_scsi_status(scb)) {
1900 default:
1901 break;
1902 case SAM_STAT_CHECK_CONDITION:
1903 case SAM_STAT_COMMAND_TERMINATED:
1904 {
1905 struct scsi_cmnd *cmd;
1906
1907 /*
1908 * Copy sense information to the OS's cmd
1909 * structure if it is available.
1910 */
1911 cmd = scb->io_ctx;
1912 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1913 struct scsi_status_iu_header *siu;
1914 u_int sense_size;
1915 u_int sense_offset;
1916
1917 if (scb->flags & SCB_SENSE) {
1918 sense_size = min(sizeof(struct scsi_sense_data)
1919 - ahd_get_sense_residual(scb),
1920 (u_long)SCSI_SENSE_BUFFERSIZE);
1921 sense_offset = 0;
1922 } else {
1923 /*
1924 * Copy only the sense data into the provided
1925 * buffer.
1926 */
1927 siu = (struct scsi_status_iu_header *)
1928 scb->sense_data;
1929 sense_size = min_t(size_t,
1930 scsi_4btoul(siu->sense_length),
1931 SCSI_SENSE_BUFFERSIZE);
1932 sense_offset = SIU_SENSE_OFFSET(siu);
1933 }
1934
1935 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1936 memcpy(cmd->sense_buffer,
1937 ahd_get_sense_buf(ahd, scb)
1938 + sense_offset, sense_size);
1939 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
1940
1941 #ifdef AHD_DEBUG
1942 if (ahd_debug & AHD_SHOW_SENSE) {
1943 int i;
1944
1945 printk("Copied %d bytes of sense data at %d:",
1946 sense_size, sense_offset);
1947 for (i = 0; i < sense_size; i++) {
1948 if ((i & 0xF) == 0)
1949 printk("\n");
1950 printk("0x%x ", cmd->sense_buffer[i]);
1951 }
1952 printk("\n");
1953 }
1954 #endif
1955 }
1956 break;
1957 }
1958 case SAM_STAT_TASK_SET_FULL:
1959 /*
1960 * By the time the core driver has returned this
1961 * command, all other commands that were queued
1962 * to us but not the device have been returned.
1963 * This ensures that dev->active is equal to
1964 * the number of commands actually queued to
1965 * the device.
1966 */
1967 dev->tag_success_count = 0;
1968 if (dev->active != 0) {
1969 /*
1970 * Drop our opening count to the number
1971 * of commands currently outstanding.
1972 */
1973 dev->openings = 0;
1974 #ifdef AHD_DEBUG
1975 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1976 ahd_print_path(ahd, scb);
1977 printk("Dropping tag count to %d\n",
1978 dev->active);
1979 }
1980 #endif
1981 if (dev->active == dev->tags_on_last_queuefull) {
1982
1983 dev->last_queuefull_same_count++;
1984 /*
1985 * If we repeatedly see a queue full
1986 * at the same queue depth, this
1987 * device has a fixed number of tag
1988 * slots. Lock in this tag depth
1989 * so we stop seeing queue fulls from
1990 * this device.
1991 */
1992 if (dev->last_queuefull_same_count
1993 == AHD_LOCK_TAGS_COUNT) {
1994 dev->maxtags = dev->active;
1995 ahd_print_path(ahd, scb);
1996 printk("Locking max tag count at %d\n",
1997 dev->active);
1998 }
1999 } else {
2000 dev->tags_on_last_queuefull = dev->active;
2001 dev->last_queuefull_same_count = 0;
2002 }
2003 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2004 ahd_set_scsi_status(scb, SAM_STAT_GOOD);
2005 ahd_platform_set_tags(ahd, sdev, &devinfo,
2006 (dev->flags & AHD_DEV_Q_BASIC)
2007 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2008 break;
2009 }
2010 /*
2011 * Drop down to a single opening, and treat this
2012 * as if the target returned BUSY SCSI status.
2013 */
2014 dev->openings = 1;
2015 ahd_platform_set_tags(ahd, sdev, &devinfo,
2016 (dev->flags & AHD_DEV_Q_BASIC)
2017 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2018 ahd_set_scsi_status(scb, SAM_STAT_BUSY);
2019 }
2020 }
2021
2022 static void
ahd_linux_queue_cmd_complete(struct ahd_softc * ahd,struct scsi_cmnd * cmd)2023 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2024 {
2025 int status;
2026 int new_status = DID_OK;
2027 int do_fallback = 0;
2028 int scsi_status;
2029 struct scsi_sense_data *sense;
2030
2031 /*
2032 * Map CAM error codes into Linux Error codes. We
2033 * avoid the conversion so that the DV code has the
2034 * full error information available when making
2035 * state change decisions.
2036 */
2037
2038 status = ahd_cmd_get_transaction_status(cmd);
2039 switch (status) {
2040 case CAM_REQ_INPROG:
2041 case CAM_REQ_CMP:
2042 new_status = DID_OK;
2043 break;
2044 case CAM_AUTOSENSE_FAIL:
2045 new_status = DID_ERROR;
2046 fallthrough;
2047 case CAM_SCSI_STATUS_ERROR:
2048 scsi_status = ahd_cmd_get_scsi_status(cmd);
2049
2050 switch(scsi_status) {
2051 case SAM_STAT_COMMAND_TERMINATED:
2052 case SAM_STAT_CHECK_CONDITION:
2053 sense = (struct scsi_sense_data *)
2054 cmd->sense_buffer;
2055 if (sense->extra_len >= 5 &&
2056 (sense->add_sense_code == 0x47
2057 || sense->add_sense_code == 0x48))
2058 do_fallback = 1;
2059 break;
2060 default:
2061 break;
2062 }
2063 break;
2064 case CAM_REQ_ABORTED:
2065 new_status = DID_ABORT;
2066 break;
2067 case CAM_BUSY:
2068 new_status = DID_BUS_BUSY;
2069 break;
2070 case CAM_REQ_INVALID:
2071 case CAM_PATH_INVALID:
2072 new_status = DID_BAD_TARGET;
2073 break;
2074 case CAM_SEL_TIMEOUT:
2075 new_status = DID_NO_CONNECT;
2076 break;
2077 case CAM_SCSI_BUS_RESET:
2078 case CAM_BDR_SENT:
2079 new_status = DID_RESET;
2080 break;
2081 case CAM_UNCOR_PARITY:
2082 new_status = DID_PARITY;
2083 do_fallback = 1;
2084 break;
2085 case CAM_CMD_TIMEOUT:
2086 new_status = DID_TIME_OUT;
2087 do_fallback = 1;
2088 break;
2089 case CAM_REQ_CMP_ERR:
2090 case CAM_UNEXP_BUSFREE:
2091 case CAM_DATA_RUN_ERR:
2092 new_status = DID_ERROR;
2093 do_fallback = 1;
2094 break;
2095 case CAM_UA_ABORT:
2096 case CAM_NO_HBA:
2097 case CAM_SEQUENCE_FAIL:
2098 case CAM_CCB_LEN_ERR:
2099 case CAM_PROVIDE_FAIL:
2100 case CAM_REQ_TERMIO:
2101 case CAM_UNREC_HBA_ERROR:
2102 case CAM_REQ_TOO_BIG:
2103 new_status = DID_ERROR;
2104 break;
2105 case CAM_REQUEUE_REQ:
2106 new_status = DID_REQUEUE;
2107 break;
2108 default:
2109 /* We should never get here */
2110 new_status = DID_ERROR;
2111 break;
2112 }
2113
2114 if (do_fallback) {
2115 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2116 ahd_name(ahd), status, cmd->device->channel,
2117 cmd->device->id, (u8)cmd->device->lun);
2118 }
2119
2120 ahd_cmd_set_transaction_status(cmd, new_status);
2121
2122 scsi_done(cmd);
2123 }
2124
2125 static void
ahd_freeze_simq(struct ahd_softc * ahd)2126 ahd_freeze_simq(struct ahd_softc *ahd)
2127 {
2128 scsi_block_requests(ahd->platform_data->host);
2129 }
2130
2131 static void
ahd_release_simq(struct ahd_softc * ahd)2132 ahd_release_simq(struct ahd_softc *ahd)
2133 {
2134 scsi_unblock_requests(ahd->platform_data->host);
2135 }
2136
2137 static int
ahd_linux_queue_abort_cmd(struct scsi_cmnd * cmd)2138 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2139 {
2140 struct ahd_softc *ahd;
2141 struct ahd_linux_device *dev;
2142 struct scb *pending_scb;
2143 u_int saved_scbptr;
2144 u_int active_scbptr;
2145 u_int last_phase;
2146 u_int cdb_byte;
2147 int retval = SUCCESS;
2148 int was_paused;
2149 int paused;
2150 int wait;
2151 int disconnected;
2152 ahd_mode_state saved_modes;
2153 unsigned long flags;
2154
2155 pending_scb = NULL;
2156 paused = FALSE;
2157 wait = FALSE;
2158 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2159
2160 scmd_printk(KERN_INFO, cmd,
2161 "Attempting to queue an ABORT message:");
2162
2163 printk("CDB:");
2164 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2165 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2166 printk("\n");
2167
2168 ahd_lock(ahd, &flags);
2169
2170 /*
2171 * First determine if we currently own this command.
2172 * Start by searching the device queue. If not found
2173 * there, check the pending_scb list. If not found
2174 * at all, and the system wanted us to just abort the
2175 * command, return success.
2176 */
2177 dev = scsi_transport_device_data(cmd->device);
2178
2179 if (dev == NULL) {
2180 /*
2181 * No target device for this command exists,
2182 * so we must not still own the command.
2183 */
2184 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2185 goto done;
2186 }
2187
2188 /*
2189 * See if we can find a matching cmd in the pending list.
2190 */
2191 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2192 if (pending_scb->io_ctx == cmd)
2193 break;
2194 }
2195
2196 if (pending_scb == NULL) {
2197 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2198 goto done;
2199 }
2200
2201 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2202 /*
2203 * We can't queue two recovery actions using the same SCB
2204 */
2205 retval = FAILED;
2206 goto done;
2207 }
2208
2209 /*
2210 * Ensure that the card doesn't do anything
2211 * behind our back. Also make sure that we
2212 * didn't "just" miss an interrupt that would
2213 * affect this cmd.
2214 */
2215 was_paused = ahd_is_paused(ahd);
2216 ahd_pause_and_flushwork(ahd);
2217 paused = TRUE;
2218
2219 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2220 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2221 goto done;
2222 }
2223
2224 printk("%s: At time of recovery, card was %spaused\n",
2225 ahd_name(ahd), was_paused ? "" : "not ");
2226 ahd_dump_card_state(ahd);
2227
2228 disconnected = TRUE;
2229 if (ahd_search_qinfifo(ahd, cmd->device->id,
2230 cmd->device->channel + 'A',
2231 cmd->device->lun,
2232 pending_scb->hscb->tag,
2233 ROLE_INITIATOR, CAM_REQ_ABORTED,
2234 SEARCH_COMPLETE) > 0) {
2235 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2236 ahd_name(ahd), cmd->device->channel,
2237 cmd->device->id, (u8)cmd->device->lun);
2238 goto done;
2239 }
2240
2241 saved_modes = ahd_save_modes(ahd);
2242 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2243 last_phase = ahd_inb(ahd, LASTPHASE);
2244 saved_scbptr = ahd_get_scbptr(ahd);
2245 active_scbptr = saved_scbptr;
2246 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2247 struct scb *bus_scb;
2248
2249 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2250 if (bus_scb == pending_scb)
2251 disconnected = FALSE;
2252 }
2253
2254 /*
2255 * At this point, pending_scb is the scb associated with the
2256 * passed in command. That command is currently active on the
2257 * bus or is in the disconnected state.
2258 */
2259 ahd_inb(ahd, SAVED_SCSIID);
2260 if (last_phase != P_BUSFREE
2261 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2262
2263 /*
2264 * We're active on the bus, so assert ATN
2265 * and hope that the target responds.
2266 */
2267 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2268 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2269 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2270 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2271 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2272 wait = TRUE;
2273 } else if (disconnected) {
2274
2275 /*
2276 * Actually re-queue this SCB in an attempt
2277 * to select the device before it reconnects.
2278 */
2279 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2280 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2281 pending_scb->hscb->cdb_len = 0;
2282 pending_scb->hscb->task_attribute = 0;
2283 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2284
2285 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2286 /*
2287 * Mark the SCB has having an outstanding
2288 * task management function. Should the command
2289 * complete normally before the task management
2290 * function can be sent, the host will be notified
2291 * to abort our requeued SCB.
2292 */
2293 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2294 pending_scb->hscb->task_management);
2295 } else {
2296 /*
2297 * If non-packetized, set the MK_MESSAGE control
2298 * bit indicating that we desire to send a message.
2299 * We also set the disconnected flag since there is
2300 * no guarantee that our SCB control byte matches
2301 * the version on the card. We don't want the
2302 * sequencer to abort the command thinking an
2303 * unsolicited reselection occurred.
2304 */
2305 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2306
2307 /*
2308 * The sequencer will never re-reference the
2309 * in-core SCB. To make sure we are notified
2310 * during reselection, set the MK_MESSAGE flag in
2311 * the card's copy of the SCB.
2312 */
2313 ahd_outb(ahd, SCB_CONTROL,
2314 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2315 }
2316
2317 /*
2318 * Clear out any entries in the QINFIFO first
2319 * so we are the next SCB for this target
2320 * to run.
2321 */
2322 ahd_search_qinfifo(ahd, cmd->device->id,
2323 cmd->device->channel + 'A', cmd->device->lun,
2324 SCB_LIST_NULL, ROLE_INITIATOR,
2325 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2326 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2327 ahd_set_scbptr(ahd, saved_scbptr);
2328 ahd_print_path(ahd, pending_scb);
2329 printk("Device is disconnected, re-queuing SCB\n");
2330 wait = TRUE;
2331 } else {
2332 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2333 retval = FAILED;
2334 }
2335
2336
2337 ahd_restore_modes(ahd, saved_modes);
2338 done:
2339 if (paused)
2340 ahd_unpause(ahd);
2341 if (wait) {
2342 DECLARE_COMPLETION_ONSTACK(done);
2343
2344 ahd->platform_data->eh_done = &done;
2345 ahd_unlock(ahd, &flags);
2346
2347 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2348 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2349 ahd_lock(ahd, &flags);
2350 ahd->platform_data->eh_done = NULL;
2351 ahd_unlock(ahd, &flags);
2352 printk("%s: Timer Expired (active %d)\n",
2353 ahd_name(ahd), dev->active);
2354 retval = FAILED;
2355 }
2356 printk("Recovery code awake\n");
2357 } else
2358 ahd_unlock(ahd, &flags);
2359
2360 if (retval != SUCCESS)
2361 printk("%s: Command abort returning 0x%x\n",
2362 ahd_name(ahd), retval);
2363
2364 return retval;
2365 }
2366
ahd_linux_set_width(struct scsi_target * starget,int width)2367 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2368 {
2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2370 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2371 struct ahd_devinfo devinfo;
2372 unsigned long flags;
2373
2374 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2375 starget->channel + 'A', ROLE_INITIATOR);
2376 ahd_lock(ahd, &flags);
2377 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2378 ahd_unlock(ahd, &flags);
2379 }
2380
ahd_linux_set_period(struct scsi_target * starget,int period)2381 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2382 {
2383 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2384 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2385 struct ahd_tmode_tstate *tstate;
2386 struct ahd_initiator_tinfo *tinfo
2387 = ahd_fetch_transinfo(ahd,
2388 starget->channel + 'A',
2389 shost->this_id, starget->id, &tstate);
2390 struct ahd_devinfo devinfo;
2391 unsigned int ppr_options = tinfo->goal.ppr_options;
2392 unsigned int dt;
2393 unsigned long flags;
2394 unsigned long offset = tinfo->goal.offset;
2395
2396 #ifdef AHD_DEBUG
2397 if ((ahd_debug & AHD_SHOW_DV) != 0)
2398 printk("%s: set period to %d\n", ahd_name(ahd), period);
2399 #endif
2400 if (offset == 0)
2401 offset = MAX_OFFSET;
2402
2403 if (period < 8)
2404 period = 8;
2405 if (period < 10) {
2406 if (spi_max_width(starget)) {
2407 ppr_options |= MSG_EXT_PPR_DT_REQ;
2408 if (period == 8)
2409 ppr_options |= MSG_EXT_PPR_IU_REQ;
2410 } else
2411 period = 10;
2412 }
2413
2414 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2415
2416 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2417 starget->channel + 'A', ROLE_INITIATOR);
2418
2419 /* all PPR requests apart from QAS require wide transfers */
2420 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2421 if (spi_width(starget) == 0)
2422 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2423 }
2424
2425 ahd_find_syncrate(ahd, &period, &ppr_options,
2426 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2427
2428 ahd_lock(ahd, &flags);
2429 ahd_set_syncrate(ahd, &devinfo, period, offset,
2430 ppr_options, AHD_TRANS_GOAL, FALSE);
2431 ahd_unlock(ahd, &flags);
2432 }
2433
ahd_linux_set_offset(struct scsi_target * starget,int offset)2434 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2435 {
2436 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2437 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2438 struct ahd_tmode_tstate *tstate;
2439 struct ahd_initiator_tinfo *tinfo
2440 = ahd_fetch_transinfo(ahd,
2441 starget->channel + 'A',
2442 shost->this_id, starget->id, &tstate);
2443 struct ahd_devinfo devinfo;
2444 unsigned int ppr_options = 0;
2445 unsigned int period = 0;
2446 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2447 unsigned long flags;
2448
2449 #ifdef AHD_DEBUG
2450 if ((ahd_debug & AHD_SHOW_DV) != 0)
2451 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2452 #endif
2453
2454 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2455 starget->channel + 'A', ROLE_INITIATOR);
2456 if (offset != 0) {
2457 period = tinfo->goal.period;
2458 ppr_options = tinfo->goal.ppr_options;
2459 ahd_find_syncrate(ahd, &period, &ppr_options,
2460 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2461 }
2462
2463 ahd_lock(ahd, &flags);
2464 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2465 AHD_TRANS_GOAL, FALSE);
2466 ahd_unlock(ahd, &flags);
2467 }
2468
ahd_linux_set_dt(struct scsi_target * starget,int dt)2469 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2470 {
2471 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2472 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2473 struct ahd_tmode_tstate *tstate;
2474 struct ahd_initiator_tinfo *tinfo
2475 = ahd_fetch_transinfo(ahd,
2476 starget->channel + 'A',
2477 shost->this_id, starget->id, &tstate);
2478 struct ahd_devinfo devinfo;
2479 unsigned int ppr_options = tinfo->goal.ppr_options
2480 & ~MSG_EXT_PPR_DT_REQ;
2481 unsigned int period = tinfo->goal.period;
2482 unsigned int width = tinfo->goal.width;
2483 unsigned long flags;
2484
2485 #ifdef AHD_DEBUG
2486 if ((ahd_debug & AHD_SHOW_DV) != 0)
2487 printk("%s: %s DT\n", ahd_name(ahd),
2488 dt ? "enabling" : "disabling");
2489 #endif
2490 if (dt && spi_max_width(starget)) {
2491 ppr_options |= MSG_EXT_PPR_DT_REQ;
2492 if (!width)
2493 ahd_linux_set_width(starget, 1);
2494 } else {
2495 if (period <= 9)
2496 period = 10; /* If resetting DT, period must be >= 25ns */
2497 /* IU is invalid without DT set */
2498 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2499 }
2500 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2501 starget->channel + 'A', ROLE_INITIATOR);
2502 ahd_find_syncrate(ahd, &period, &ppr_options,
2503 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2504
2505 ahd_lock(ahd, &flags);
2506 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2507 ppr_options, AHD_TRANS_GOAL, FALSE);
2508 ahd_unlock(ahd, &flags);
2509 }
2510
ahd_linux_set_qas(struct scsi_target * starget,int qas)2511 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2512 {
2513 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2514 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2515 struct ahd_tmode_tstate *tstate;
2516 struct ahd_initiator_tinfo *tinfo
2517 = ahd_fetch_transinfo(ahd,
2518 starget->channel + 'A',
2519 shost->this_id, starget->id, &tstate);
2520 struct ahd_devinfo devinfo;
2521 unsigned int ppr_options = tinfo->goal.ppr_options
2522 & ~MSG_EXT_PPR_QAS_REQ;
2523 unsigned int period = tinfo->goal.period;
2524 unsigned int dt;
2525 unsigned long flags;
2526
2527 #ifdef AHD_DEBUG
2528 if ((ahd_debug & AHD_SHOW_DV) != 0)
2529 printk("%s: %s QAS\n", ahd_name(ahd),
2530 qas ? "enabling" : "disabling");
2531 #endif
2532
2533 if (qas) {
2534 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2535 }
2536
2537 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2538
2539 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2540 starget->channel + 'A', ROLE_INITIATOR);
2541 ahd_find_syncrate(ahd, &period, &ppr_options,
2542 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2543
2544 ahd_lock(ahd, &flags);
2545 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2546 ppr_options, AHD_TRANS_GOAL, FALSE);
2547 ahd_unlock(ahd, &flags);
2548 }
2549
ahd_linux_set_iu(struct scsi_target * starget,int iu)2550 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2551 {
2552 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2553 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2554 struct ahd_tmode_tstate *tstate;
2555 struct ahd_initiator_tinfo *tinfo
2556 = ahd_fetch_transinfo(ahd,
2557 starget->channel + 'A',
2558 shost->this_id, starget->id, &tstate);
2559 struct ahd_devinfo devinfo;
2560 unsigned int ppr_options = tinfo->goal.ppr_options
2561 & ~MSG_EXT_PPR_IU_REQ;
2562 unsigned int period = tinfo->goal.period;
2563 unsigned int dt;
2564 unsigned long flags;
2565
2566 #ifdef AHD_DEBUG
2567 if ((ahd_debug & AHD_SHOW_DV) != 0)
2568 printk("%s: %s IU\n", ahd_name(ahd),
2569 iu ? "enabling" : "disabling");
2570 #endif
2571
2572 if (iu && spi_max_width(starget)) {
2573 ppr_options |= MSG_EXT_PPR_IU_REQ;
2574 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2575 }
2576
2577 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2578
2579 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2580 starget->channel + 'A', ROLE_INITIATOR);
2581 ahd_find_syncrate(ahd, &period, &ppr_options,
2582 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2583
2584 ahd_lock(ahd, &flags);
2585 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2586 ppr_options, AHD_TRANS_GOAL, FALSE);
2587 ahd_unlock(ahd, &flags);
2588 }
2589
ahd_linux_set_rd_strm(struct scsi_target * starget,int rdstrm)2590 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2591 {
2592 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2593 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2594 struct ahd_tmode_tstate *tstate;
2595 struct ahd_initiator_tinfo *tinfo
2596 = ahd_fetch_transinfo(ahd,
2597 starget->channel + 'A',
2598 shost->this_id, starget->id, &tstate);
2599 struct ahd_devinfo devinfo;
2600 unsigned int ppr_options = tinfo->goal.ppr_options
2601 & ~MSG_EXT_PPR_RD_STRM;
2602 unsigned int period = tinfo->goal.period;
2603 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2604 unsigned long flags;
2605
2606 #ifdef AHD_DEBUG
2607 if ((ahd_debug & AHD_SHOW_DV) != 0)
2608 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2609 rdstrm ? "enabling" : "disabling");
2610 #endif
2611
2612 if (rdstrm && spi_max_width(starget))
2613 ppr_options |= MSG_EXT_PPR_RD_STRM;
2614
2615 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2616 starget->channel + 'A', ROLE_INITIATOR);
2617 ahd_find_syncrate(ahd, &period, &ppr_options,
2618 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2619
2620 ahd_lock(ahd, &flags);
2621 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2622 ppr_options, AHD_TRANS_GOAL, FALSE);
2623 ahd_unlock(ahd, &flags);
2624 }
2625
ahd_linux_set_wr_flow(struct scsi_target * starget,int wrflow)2626 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2627 {
2628 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2629 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2630 struct ahd_tmode_tstate *tstate;
2631 struct ahd_initiator_tinfo *tinfo
2632 = ahd_fetch_transinfo(ahd,
2633 starget->channel + 'A',
2634 shost->this_id, starget->id, &tstate);
2635 struct ahd_devinfo devinfo;
2636 unsigned int ppr_options = tinfo->goal.ppr_options
2637 & ~MSG_EXT_PPR_WR_FLOW;
2638 unsigned int period = tinfo->goal.period;
2639 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2640 unsigned long flags;
2641
2642 #ifdef AHD_DEBUG
2643 if ((ahd_debug & AHD_SHOW_DV) != 0)
2644 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2645 wrflow ? "enabling" : "disabling");
2646 #endif
2647
2648 if (wrflow && spi_max_width(starget))
2649 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2650
2651 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2652 starget->channel + 'A', ROLE_INITIATOR);
2653 ahd_find_syncrate(ahd, &period, &ppr_options,
2654 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2655
2656 ahd_lock(ahd, &flags);
2657 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2658 ppr_options, AHD_TRANS_GOAL, FALSE);
2659 ahd_unlock(ahd, &flags);
2660 }
2661
ahd_linux_set_rti(struct scsi_target * starget,int rti)2662 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2663 {
2664 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2665 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2666 struct ahd_tmode_tstate *tstate;
2667 struct ahd_initiator_tinfo *tinfo
2668 = ahd_fetch_transinfo(ahd,
2669 starget->channel + 'A',
2670 shost->this_id, starget->id, &tstate);
2671 struct ahd_devinfo devinfo;
2672 unsigned int ppr_options = tinfo->goal.ppr_options
2673 & ~MSG_EXT_PPR_RTI;
2674 unsigned int period = tinfo->goal.period;
2675 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2676 unsigned long flags;
2677
2678 if ((ahd->features & AHD_RTI) == 0) {
2679 #ifdef AHD_DEBUG
2680 if ((ahd_debug & AHD_SHOW_DV) != 0)
2681 printk("%s: RTI not available\n", ahd_name(ahd));
2682 #endif
2683 return;
2684 }
2685
2686 #ifdef AHD_DEBUG
2687 if ((ahd_debug & AHD_SHOW_DV) != 0)
2688 printk("%s: %s RTI\n", ahd_name(ahd),
2689 rti ? "enabling" : "disabling");
2690 #endif
2691
2692 if (rti && spi_max_width(starget))
2693 ppr_options |= MSG_EXT_PPR_RTI;
2694
2695 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2696 starget->channel + 'A', ROLE_INITIATOR);
2697 ahd_find_syncrate(ahd, &period, &ppr_options,
2698 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2699
2700 ahd_lock(ahd, &flags);
2701 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2702 ppr_options, AHD_TRANS_GOAL, FALSE);
2703 ahd_unlock(ahd, &flags);
2704 }
2705
ahd_linux_set_pcomp_en(struct scsi_target * starget,int pcomp)2706 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2707 {
2708 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2709 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2710 struct ahd_tmode_tstate *tstate;
2711 struct ahd_initiator_tinfo *tinfo
2712 = ahd_fetch_transinfo(ahd,
2713 starget->channel + 'A',
2714 shost->this_id, starget->id, &tstate);
2715 struct ahd_devinfo devinfo;
2716 unsigned int ppr_options = tinfo->goal.ppr_options
2717 & ~MSG_EXT_PPR_PCOMP_EN;
2718 unsigned int period = tinfo->goal.period;
2719 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2720 unsigned long flags;
2721
2722 #ifdef AHD_DEBUG
2723 if ((ahd_debug & AHD_SHOW_DV) != 0)
2724 printk("%s: %s Precompensation\n", ahd_name(ahd),
2725 pcomp ? "Enable" : "Disable");
2726 #endif
2727
2728 if (pcomp && spi_max_width(starget)) {
2729 uint8_t precomp;
2730
2731 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2732 const struct ahd_linux_iocell_opts *iocell_opts;
2733
2734 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2735 precomp = iocell_opts->precomp;
2736 } else {
2737 precomp = AIC79XX_DEFAULT_PRECOMP;
2738 }
2739 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2740 AHD_SET_PRECOMP(ahd, precomp);
2741 } else {
2742 AHD_SET_PRECOMP(ahd, 0);
2743 }
2744
2745 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2746 starget->channel + 'A', ROLE_INITIATOR);
2747 ahd_find_syncrate(ahd, &period, &ppr_options,
2748 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2749
2750 ahd_lock(ahd, &flags);
2751 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2752 ppr_options, AHD_TRANS_GOAL, FALSE);
2753 ahd_unlock(ahd, &flags);
2754 }
2755
ahd_linux_set_hold_mcs(struct scsi_target * starget,int hold)2756 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2757 {
2758 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2759 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2760 struct ahd_tmode_tstate *tstate;
2761 struct ahd_initiator_tinfo *tinfo
2762 = ahd_fetch_transinfo(ahd,
2763 starget->channel + 'A',
2764 shost->this_id, starget->id, &tstate);
2765 struct ahd_devinfo devinfo;
2766 unsigned int ppr_options = tinfo->goal.ppr_options
2767 & ~MSG_EXT_PPR_HOLD_MCS;
2768 unsigned int period = tinfo->goal.period;
2769 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2770 unsigned long flags;
2771
2772 if (hold && spi_max_width(starget))
2773 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2774
2775 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2776 starget->channel + 'A', ROLE_INITIATOR);
2777 ahd_find_syncrate(ahd, &period, &ppr_options,
2778 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2779
2780 ahd_lock(ahd, &flags);
2781 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2782 ppr_options, AHD_TRANS_GOAL, FALSE);
2783 ahd_unlock(ahd, &flags);
2784 }
2785
ahd_linux_get_signalling(struct Scsi_Host * shost)2786 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2787 {
2788 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2789 unsigned long flags;
2790 u8 mode;
2791
2792 ahd_lock(ahd, &flags);
2793 ahd_pause(ahd);
2794 mode = ahd_inb(ahd, SBLKCTL);
2795 ahd_unpause(ahd);
2796 ahd_unlock(ahd, &flags);
2797
2798 if (mode & ENAB40)
2799 spi_signalling(shost) = SPI_SIGNAL_LVD;
2800 else if (mode & ENAB20)
2801 spi_signalling(shost) = SPI_SIGNAL_SE;
2802 else
2803 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2804 }
2805
2806 static struct spi_function_template ahd_linux_transport_functions = {
2807 .set_offset = ahd_linux_set_offset,
2808 .show_offset = 1,
2809 .set_period = ahd_linux_set_period,
2810 .show_period = 1,
2811 .set_width = ahd_linux_set_width,
2812 .show_width = 1,
2813 .set_dt = ahd_linux_set_dt,
2814 .show_dt = 1,
2815 .set_iu = ahd_linux_set_iu,
2816 .show_iu = 1,
2817 .set_qas = ahd_linux_set_qas,
2818 .show_qas = 1,
2819 .set_rd_strm = ahd_linux_set_rd_strm,
2820 .show_rd_strm = 1,
2821 .set_wr_flow = ahd_linux_set_wr_flow,
2822 .show_wr_flow = 1,
2823 .set_rti = ahd_linux_set_rti,
2824 .show_rti = 1,
2825 .set_pcomp_en = ahd_linux_set_pcomp_en,
2826 .show_pcomp_en = 1,
2827 .set_hold_mcs = ahd_linux_set_hold_mcs,
2828 .show_hold_mcs = 1,
2829 .get_signalling = ahd_linux_get_signalling,
2830 };
2831
2832 static int __init
ahd_linux_init(void)2833 ahd_linux_init(void)
2834 {
2835 int error = 0;
2836
2837 /*
2838 * If we've been passed any parameters, process them now.
2839 */
2840 if (aic79xx)
2841 aic79xx_setup(aic79xx);
2842
2843 ahd_linux_transport_template =
2844 spi_attach_transport(&ahd_linux_transport_functions);
2845 if (!ahd_linux_transport_template)
2846 return -ENODEV;
2847
2848 scsi_transport_reserve_device(ahd_linux_transport_template,
2849 sizeof(struct ahd_linux_device));
2850
2851 error = ahd_linux_pci_init();
2852 if (error)
2853 spi_release_transport(ahd_linux_transport_template);
2854 return error;
2855 }
2856
2857 static void __exit
ahd_linux_exit(void)2858 ahd_linux_exit(void)
2859 {
2860 ahd_linux_pci_exit();
2861 spi_release_transport(ahd_linux_transport_template);
2862 }
2863
2864 module_init(ahd_linux_init);
2865 module_exit(ahd_linux_exit);
2866